Creating a Topic

Scenarios

A topic serves as a message sending channel, where publishers and subscribers can interact with each other.

You can create your own topic.

Creating a Topic

1. Log in to the management console.
2. In the upper left corner, select a region and project.
3. In the service list, select Simple Message Notification.

   The SMN console is displayed.

4. In the navigation pane on the left, choose Topic Management > Topics.

   The Topics page is displayed.

5. Click Create Topic.

   The Create Topic dialog box is displayed.

6. Enter a topic name and display name (topic description).

   Table 1 Parameters required for creating a topic

   Parameter	Description
   Topic Name	Specifies the topic name, which Contains only letters, digits, hyphens (-), and underscores (_) and must start with a letter or a digit. Must contain 1 to 255 characters. Must be unique and cannot be modified once the topic is created.
   Display Name	Specifies the message sender name, which can contain up to 192 bytes. NOTE: After you specify a display name in Display name<username@example.com> format, the name you specify will be displayed as the email sender. Otherwise, the sender will be username@example.com.

7. Click OK.

   The topic you created is displayed in the topic list.

   After you create a topic, the system generates a uniform resource name (URN) for the topic, which uniquely identifies the topic and cannot be changed.

8. Click a topic name to view the topic details and the total number of topic subscriptions.

Follow-up Operations

After you create a topic, add subscriptions. After the subscriptions have been confirmed, alarm notifications will be sent to the subscription endpoints via SMN.